even the smallest spark, could trigger an explosion and a fire on the platform and sink the rig and send fire down the well. but officials i spoke to tonight, they dismiss that as speculation, saying there is no immediate concern about the flare and they added that the wind is actually working in their favor, blowing the gas cloud away from the flare. they also added that in their opinion, this is not a repeat of the bp disaster in the gulf of mexico. unlike the deep-water horizon rig, this platform is in fairly shallow water, about 300 feet, but its well goes much deeper into the earth, some fo miles. that distance plus the solid rock in the north sea is going to make drilling a relief well much tougher. the estimate is six months. you remember in the bp case, it was three months. brian. >> anne thompson on this still unfolding story off the coast of scotland, anne, thanks. in cuba today, on the final day of the pope's visit, an historic mass. in havana's revolution square.